摘要:
The present invention relates to a process for the preparation of iodinated phenols, —in particular, it relates to a process including the electrochemical iodination of 3,5-disubstituted phenols of formula (1) to the corresponding 3,5-disubstituted-2,4,6-triiodophenols of formula (2), which are useful intermediates for the synthesis of x-ray contrast media, and to the preparation of the contrast media themselves. Furthermore, the present invention includes the electrochemical iodination of 3,5-disubstituted anilines of formula (6) to the corresponding 3,5-disubstituted-2,4,6-triiodoanilins of formula (7).
摘要:
The present invention relates to a novel class of diagnostically or therapeutically effective compounds comprising novel aza-bicycloalkane based cyclic peptides, acting as a targeting moiety towards integrin receptors.
摘要:
The present invention relates to a new class of paramagnetic ion-based contrast agents of molecular weight lower than 3.5 kDa that show a pharmacokinetic profile analogous to that of the commonly used T1-general extravascular agents and that are further characterized by a higher relaxivity.
摘要:
The invention relates to a one-step process for the preparation of aqueous solutions of hyperpolarized molecules in which, in a single step, the said hyperpolarized molecules are separated from the crude solution by means of a fast phase-transfer extraction and isolated in an impurity-free aqueous solution, ready for use in the MRI diagnostic imaging of organs, region or tissues of the human or animal body.
摘要:
The invention relates to aryl-sulphonamido compounds endowed with affinity against metallo proteases MMP, having formula (I) below wherein R, R1, R2, R3, G and n have the meanings reported in the specification, properly labelled with diagnostic imaging moieties or even radiotherapeutic moieties. The invention also refers to the process for their preparation, to pharmaceutical compositions comprising them and to their use as diagnostic imaging agents or radiotherapeutic agents.
摘要:
The present invention refers to diagnostically or radiotherapeutically useful compounds which are able to selectively bind to lectins, having formula (I) wherein R, R′, R1, R2 and R3 are as defined in the specification; the process for their preparation and the pharmaceutical compositions thereof.
摘要:
Compounds of formulae (I) and (II) ##STR1## wherein the R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 groups have the meanings defined in the disclosure, are useful chelants for metal ions. The complexes of compounds (I) and (II) with paramagnetic ions are useful as contrast agents for M.R.I. imaging.
摘要:
A process for the preparation of 5-acylamino-2,4,6-triiodo or tribromo-benzoic acid derivatives of formula (I), wherein X is I or Br, R is H or a variously substituted alkyl, or a group of formula (II), wherein X has the above meanings; Y is hydroxy, alkoxy, hydroxyalkoxy, alkylamino or hydroxyalkylamino; Z may be the same as COY or it is hydroxylalkylaminocarbonyl provided that at least one of the two acyl or R groups is hydroxy-substituted, which process comprises the rearrangement of the corresponding 5-(alkylaminocarbonyl-alkoxy)-2,4,6-trioodo ro tribromo-benzoic acid derivatives, in the presence of bases.
摘要:
Compounds of formula ##STR1## wherein Ar represents an optionally substituted aryl group;R represents a C.sub.1 -C.sub.4 alkyl;R.sub.1 and R.sub.2, equal to or different from each other, represent hydroxy, O.sup.- M.sup.+, OR.sub.3 or ##STR2## R.sub.3 represents a C.sub.1 -C.sub.24 alkyl, a C.sub.3 -C.sub.6 cycloalkyl, a phenyl or a benzyl;M.sup.+ represents the cation of an alkaline metal;R.sub.4 and R.sub.5, equal to or different from each other, represent a hydrogen atom, a C.sub.1 -C.sub.4 alkyl, a C.sub.5 -C.sub.6 cycloalkyl, a (CH.sub.2).sub.n --CH.sub.2 OH group with n=1, 2 or 3, or R.sub.4 and R.sub.5 together are a group (CH.sub.2).sub.m with m=4 or 5, a group --CH.sub.2 --CH.sub.2 --R.sub.6 --CH.sub.2 --CH.sub.2 -- in which R.sub.6 is an oxygen atom, an N--H or N--(C.sub.1 -C.sub.4) alkyl group;X represents a chlorine, bromine or iodine atom, an hydroxy, acyloxy, alkylsulphonyloxy or arylsulphonyloxy group;the carbon atoms marked by an asterisk are both contemporaneously in the R or S configuration, are described.The preparation of the compound of formula I by ketalization or by trans-ketalization with tartaric acid derivatives and their rearrangement into alpha-arylalkanoic acids is described too.
摘要:
A new enantioselective process is described for preparing optically active alpha-arylalkanoic acids by:(a) halogenation on the aliphatic carbon atom alpha to the ketal group, of ketals of formula ##STR1## in which Ar represents an aryl, optionally substituted;R represents a C.sub.1 -C.sub.4 alkyl;R.sub.1 and R.sub.2, represents a hydroxy, a O.sup.- M.sup.+, OR.sub.3 or NR.sub.4 R.sub.5 group; the carbon atoms indicated by an asterisk both simultaneously are in (R) or (S) configuration.This reaction is diastereoselective, so that a misture of alpha-haloketals is obtained in which one of the two epimers prevails, and generally strongly prevails, over the other.(b) rearrangement of the haloketals of formula ##STR2## in which X is Cl, Br or I to alpha-arylalkanoic acids in a single stage or in two successive stages, by way of esters of formula ##STR3## The compounds (A) and (C) are all new compounds. The rearrangement step (b) may be performed under new, inventive conditions.The esters of formula (C) have pharmacological activity analogous to that of the corresponding alpha-arylalkanoic acids.